This filter set has three layers of filters, including a pre-filter, an activated carbon filter, and a HEPA 13 filter. It is designed as a replacement filter set for the LR500 model. The HEPA filter technology has a performance of 99.95%. The pre-filter captures domestic dust, hairs, and small insects, while the activated carbon filter captures harmful gases, various odors, and heavy metals. The HEPA 13 filter captures bacteria, viruses, mites, and pollen.